<template>
    <div class="header">
        <div class="nav-topbar">
            <div class="container">
                <div class="topbar-menu">
                    <a href="javascript:;">小米商城</a>
                    <a href="javascript:;">MUI</a>
                    <a href="javascript:;">云服务</a>
                    <a href="javascript:;">协议规则</a>
                </div>
                <div class="topbar-user">
                    <a href="javascript:;" v-if="username">{{username}}</a>
                    <a href="javascript:;" v-if="!username" @click="login">登录</a>
                    <a href="javascript:;" v-if="username" @click="logout">退出</a>
                    <a href="/#/order/list" v-if="username">我的订单</a>
                    <a href="javascript:;" class="my-cart" @click="gotoCart"><span class="icon-cart"></span>购物车({{cartCount}})</a>
                </div>
            </div>
        </div>
        <div class="nav-header">
            <div class="container">
                <div class="header-logo">
                    <a href="/#/index"></a>
                </div>
                <div class="header-menu">
                    <div class="item-menu">
                        <span>小米手机</span>
                        <div class="children">
                            <ul> 
                                <li class="product" v-for="(item,index) in phoneList" :key='index'>
                                    <a v-bind:href="'/#/product/'+item.id" target="_blank">
                                        <div class="pro-img">
                                            <img v-lazy="item.mainImage" :alt="item.subtitle">
                                        </div>
                                        <div class="pro-name">{{item.name}}</div>
                                        <div class="pro-price">{{item.price|currency}}</div>
                                    </a>
                                </li>
                            </ul>
                        </div>
                    </div>
                    <div class="item-menu">
                        <span>Redmi小米</span>
                    </div>
                    <div class="item-menu">
                        <span>电视</span>
                        <div class="children">
                            <ul>
                                <li class="product">
                                    <a href="">
                                        <div class="pro-img">
                                            <img v-lazy="'/imgs/nav-img/nav-3-1.jpg'" alt="">
                                        </div>
                                        <div class="pro-name">电视1</div>
                                        <div class="pro-price">1115元</div>
                                    </a>
                                </li>
                                <li class="product">
                                    <a href="">
                                        <div class="pro-img">
                                            <img v-lazy="'/imgs/nav-img/nav-3-2.jpg'" alt="">
                                        </div>
                                        <div class="pro-name">电视2</div>
                                        <div class="pro-price">1115元</div>
                                    </a>
                                </li>
                                <li class="product">
                                    <a href="">
                                        <div class="pro-img">
                                            <img v-lazy="'/imgs/nav-img/nav-3-3.png'" alt="">
                                        </div>
                                        <div class="pro-name">电视3</div>
                                        <div class="pro-price">1115元</div>
                                    </a>
                                </li>
                                <li class="product">
                                    <a href="">
                                        <div class="pro-img">
                                            <img v-lazy="'/imgs/nav-img/nav-3-4.jpg'" alt="">
                                        </div>
                                        <div class="pro-name">电视4</div>
                                        <div class="pro-price">1115元</div>
                                    </a>
                                </li>
                                <li class="product">
                                    <a href="">
                                        <div class="pro-img">
                                            <img v-lazy="'/imgs/nav-img/nav-3-5.jpg'" alt="">
                                        </div>
                                        <div class="pro-name">电视5</div>
                                        <div class="pro-price">1115元</div>
                                    </a>
                                </li>
                                <li class="product">
                                    <a href="">
                                        <div class="pro-img">
                                            <img v-lazy="'/imgs/nav-img/nav-3-6.png'" alt="">
                                        </div>
                                        <div class="pro-name">电视6</div>
                                        <div class="pro-price">1115元</div>
                                    </a>
                                </li>
                            </ul>
                        </div>
                    </div>
                </div>
                <div class="header-search">
                    <div class="wrapper">
                        <input type="text" name="keyword">
                        <a href="javascript:;"></a>
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>
<script>
import {mapState} from 'vuex';
export default {
    name:'nav-header',//home直接引用的nav-header标签，与这个名字无关，与NavHeader.vue这个名字有关
    data()
    {
        return{
            phoneList:[],
        }
    },
    computed:{
        // username(){
        //     return this.$store.state.username;
        // },
        // cartCount(){
        //     return this.$store.state.cartCount;
        // }
        ...mapState(['username','cartCount'])
    },
    mounted()
    {
        this.getProductList();
        let params = this.$route.params;
        if(params && params.from == 'login'){
            this.getCartCount();
        }
    },
    filters:{
      currency(val){
        if(!val)return '0.00';
        return '￥' + val.toFixed(2) + '元';
      }
    },
    methods:{
        getProductList(){
            this.axios.get('/products',
            {
                params:{
                    categoryId:'100012',
                    pageSize:6
                    //传六组数据
                }//用get方法时需要用params传递参数，若用post则不需要用params
            }).then((res)=>{
                this.phoneList = res.list
            })
        },
        getCartCount(){
            this.axios.get('/carts/products/sum').then((res=0)=>{
            this.$store.dispatch('saveCartCount',res);
        })
      },
        gotoCart()
        {
            this.$router.push('/cart');
        },
        login()
        {
            this.$router.push('/login')
        },
        logout()
        {
            this.axios.post('/user/logout').then(()=>{
                this.$message.success('退出成功');
                this.$cookie.set('userId','',{expires:'-1'});
                this.$store.dispatch('saveUserName','');
                this.$store.dispatch('saveCartCount','0');
           })
        }
    }
}
</script>
<style lang="scss">
@import '../assets/scss/base.scss';
@import '../assets/scss/mixin.scss';
@import '../assets/scss/config.scss';
.header{
    .nav-topbar{
    height:39px;
    line-height:39px;
    background-color:$colorB;
        .container{
            @include flex();
            // display: flex;
            // justify-content: space-between;
            // align-items: center;
            a{
               display: inline-block;
               color: #B0B0B0;
               margin-right: 17px;
            }
            .my-cart{
                width:110px;
                background-color:$colorA;
                text-align:center;
                color:#ffffff;
                margin-right:0;
            }
            .icon-cart{
                display: inline-block;
                width: 16px;
                height: 12px;
                background: url('/imgs/icon-cart-checked.png')no-repeat center;
                background-size: contain;
                margin-right: 4px;
            }
           
        }
    }
    .nav-header{
        .container{
            @include flex();
            position: relative;
            height: 112px;
            .header-menu{
                width: 643px;
                padding-left: 209px;
                .item-menu{
                    display: inline-block;
                    font-size: 16px;
                    font-weight: bold;
                    line-height: 112px;
                    margin-right: 20px;
                    span{
                        cursor: pointer;
                    }
                    &:hover{
                        color: $colorA;
                        .children{
                            height: 220px;
                            opacity: 1;
                        }
                    }
                    .children{
                        border-top: 1px solid #E5E5E5;
                        z-index: 10;
                        position: absolute;
                        top: 112px;
                        left: 0;
                        width: 1226px;
                        height: 0px;
                        opacity: 0;
                        overflow: hidden;
                        transition: all 0.5s;
                        background-color: $colorG;
                        box-shadow:0px 7px 6px 0px rgba(0, 0, 0, 0.11);
                        a{
                            display: inline-block;
                        }
                        .product{
                            position: relative;
                            float: left;
                            width: 16.6%;
                            text-align: center;
                            font-size: 12px;
                            line-height: 12px;
                            &::before{
                                position: absolute;
                                content: '';
                                top: 28px;
                                right: 0;
                                height: 100px;
                                width: 1px;
                                border-right: 1px solid $colorF;
                            };
                            &:last-child::before{
                                display: none;
                            }
                        }
                        img{
                            margin-top: 26px;
                            height: 111px;
                            width: auto;
                        }
                        .pro-img{
                            height: 137px;
                        }
                        .pro-name{
                            font-weight: bold;
                            color: $colorB;
                            margin-top:19px;
                            margin-bottom: 8px;
                        }
                        .pro-price{
                            color: $colorA;
                        }
                    }
                }
            }
            .header-search{
                width: 319px;
                .wrapper{
                    height:50px;
                    border:1px solid #E0E0E0;
                    display:flex;
                    align-items:center;
                    input{
                        border: none;
                        box-sizing: border-box;
                        border-right: 1px solid #E0E0E0;
                        width: 264px;
                        height: 50px;
                        padding-left: 14px;
                    }
                    a{
                        @include bgImg(18px,18px,'/imgs/icon-search.png');
                        margin-left: 17px;
                    }
                }
            }
        }
    }
}
</style>